![]() The atoms comprising a metal are arranged in a certain geometric pattern, specific for that particular metal or alloy, and are maintained in that pattern by interatomic forces. When a load is applied to metal, the atomic structure itself is strained, being compressed, warped or extended in the process. Strain will be discussed in more detail in the next chapter. If the distortion disappears and the metal remains distorted, the strain type is called plastic strain. If the distortion disappears and the metal returns to its original dimensions upon removal of the load, the strain is called elastic strain. ![]() The intensity, or degree, of distortion is known as strain. If the load is small, the distortion will probably disappear when the load is removed. When a metal is subjected to a load (force), it is distorted or deformed, no matter how strong the metal or light the load. Personnel need to be aware how stress may be applied and how it effects the component. Stress is a form of load that may be applied to a component. The load may be one of the following types: a load that is applied steadily ("dead" load) a load that fluctuates, with slow or fast changes in magnitude ("live" load) a load that is applied suddenly (shock load) or a load due to impact in some form. Any component, no matter how simple or complex, has to transmit or sustain a mechanical load of some sort. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |